72106912 has 12 divisors (see below), whose sum is σ = 141960546. Its totient is φ = 36053440.

The previous prime is 72106897. The next prime is 72106913. The reversal of 72106912 is 21960127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64064016 + 8042896 = 8004^2 + 2836^2 .

It is not an unprimeable number, because it can be changed into a prime (72106913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126639 + ... + 1126702.

Almost surely, 2^72106912 is an apocalyptic number.

It is an amenable number.

72106912 is a deficient number, since it is larger than the sum of its proper divisors (69853634).

72106912 is a wasteful number, since it uses less digits than its factorization.

72106912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253351 (or 2253343 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 72106912 is about 8491.5788873448. The cubic root of 72106912 is about 416.2225756656. Note that the first 3 decimals are identical.

The spelling of 72106912 in words is "seventy-two million, one hundred six thousand, nine hundred twelve".